how damaging it is? - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 02-06-2007, 04:58 PM Thread Starter
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Date registered: Mar 2005
Vehicle: 01 W220 S320L, 02 W203 C240, 05 W209 CLK200K, 1995 RS Cosworth Rallye
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Unhappy how damaging it is?

hi all,

we currently own a W203 C240 which i recently changed its engine to a bigger 3.2L. why stop there? so, i rebore the block and fit in oversized pistons and its now about 3400cc.

as a result, its about 180bhp and about 250Nm on wheels.

The car is being driven by my wife and without me knowing, all this while, she is using REGULAR FUEL instead of PREMIUM.

The question is, HOW DAMAGING IT IS TO THE NEW ENGINE? its been running about 5-7 refuels of 2000-3000kms.

What do i need to do to control the damage?

Please help.


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post #2 of 2 (permalink) Old 02-06-2007, 05:14 PM
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Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6.7l
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Last decade engines are equipped with anti-knock sensor, so shouldn't be any damage.
Than since you re-bore the block, I would assume you might remove the sensors as well?
This way, or another there is nothing you can do at this time.
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